Browzy

A clean-room, source-published alternative to Claude in Chrome — no domain blocklist, any Chromium browser.

Independent project — not affiliated with Anthropic

Claude in Chrome gives you 58 blocked domains. Browzy gives you the whole web.

Browzy is a clean-room reimplementation of the official Claude in Chrome extension, with its full source published: no domain blocklist, any Chromium browser, and a 26-tool browser automation registry driven by your own Anthropic-compatible API key.

Install Browzy View on GitHub

Browzy reading a news article in the side panel and answering questions about it — Browzy reading the page you already have open and answering about it — in the side panel, beside the tab, with nothing copy-pasted.

What's different

	Claude in Chrome	Browzy
Domain blocklist	58 blocked domains across 11 categories	No blocklist — navigate anywhere
Browser support	Chrome and Edge only	Any Chromium browser (Chrome, Edge, Brave, and more)
Source code	Closed source	Source published — see the repository LICENSE
Account required	Claude account/subscription	None — bring your own Anthropic-compatible API key

Two halves that have to agree

Browzy is made of two pieces that must both be installed and must match each other. The extension can't do anything on its own — it talks to the companion through Chrome's native messaging, which refuses to connect unless the companion is already registered on disk.

Browser extension

The interface and browser control surface.

Runs inside Chrome, Edge, or Brave

Companion (native host)

The agent's brain — runs the Claude Agent SDK.

A Node process on your machine

What it does

Built-in side panel

Chat with the agent directly in the browser. No Claude account, no terminal — just your own Anthropic-compatible Base URL, API key, and model.

No domain blocklist

Navigate to any site; the official extension blocks 58 domains across 11 categories.

Any Chromium browser

Chrome, Edge, or Brave — not locked to Chrome and Edge.

Source you can read

The full source is public. Read it, audit it, or run it from your own clone — check the repository LICENSE for the terms that apply to you.

Local by design

No project server. Page content and your messages go straight from your machine to the AI endpoint you configure.

Your data

Browzy has no server. Nothing you do in the panel is seen by us — read the privacy policy for exactly what data leaves your machine and when.

Read the privacy policy

Get Browzy

Clone the repository and follow the installation guide — the extension and the companion both come from the same checkout.

Installation guide View Repository

Independent project. Not affiliated with, endorsed by, or sponsored by Anthropic.